Door & Window Contacts — Specs, Brands & Hong Kong Installation
Magnetic reed contacts for metal gates, aluminium windows, shutters, and internal doors.
What this sensor does
Contacts report open/close status the moment a door, gate, or window moves. They are the first line of entry protection on almost every Hong Kong alarm we install — especially metal gates in shared corridors and shop roller shutters.
Honeywell 5816 is our most-used wireless contact for finished flats. Bosch ISN-CMET-4418 is the wired wide-gap choice for steel gates and shutters on G-series and Solution panels.
- Surface mount for typical HK frames
- Wide-gap options for thick metal gates
- Wired Bosch and wireless Honeywell 5800
- Tested at full gate travel, including ajar positions
Sensor brands & official websites
Brand names with manufacturer product pages. We specify models after a site survey and install them in Hong Kong.
Brand
Honeywell / Resideo
Wireless 5800-series PIRs, contacts, glass-break, smoke, shock, and flood sensors for VISTA and ProSeries panels.
Brand
Bosch
Blue Line and TriTech motion, magnetic contacts, glass-break, smoke, seismic, and zone water probes for G-series panels.
Brand comparison
Side-by-side specs for models Swan CCTV supplies and installs.
| Spec | Honeywell5816WMWH | BoschISN-CMET-4418 Magnetic Contact |
|---|---|---|
| Type | Wireless reed contact | Wired magnetic reed contact |
| Coverage / range | — | Wide-gap class for metal frames |
| Power | Lithium coin / AA class (by revision) | Panel zone voltage |
| Best for | Entry-point protection | Metal gates, roller shutters, and fire-exit doors |
Models we install
Open any model for full specifications, datasheets, and Hong Kong installation notes.
5816WMWH
Wireless magnetic contact for doors and windows.
- Type
- Wireless reed contact
- Loop
- Internal + external terminals
- Battery
- Lithium coin / AA class (by revision)
- Supervision
- Yes
ISN-CMET-4418 Magnetic Contact
Heavy-duty magnetic reed contact for Bosch wired zones on doors, shutters, and gates.
- Type
- Wired magnetic reed contact
- Gap
- Wide-gap class for metal frames
- Loop
- Closed-circuit / EOL as programmed
- Voltage
- Panel zone voltage
Hong Kong / local context
Factory magnet gap limits are often exceeded on local metal gates. We carry spacers and alternative magnet kits.
Contacts on shared-corridor gates are usually mounted inside the flat to reduce vandalism.
Other sensor types
Complete coverage usually mixes several detector types on one panel.
PIR Motion Sensors
Passive infrared and dual-technology motion detectors for rooms, corridors, and shop floors.
View modelsGlass Break Detectors
Acoustic detectors that listen for breaking glass across a room — useful for shopfronts and glazed offices.
View modelsSmoke & Heat Detectors
Photoelectric smoke and heat detectors that report fire warning on the same alarm panel as intrusion.
View modelsVibration & Shock Sensors
Shock and seismic detectors for windows, walls, safes, and forced-entry on solid structures.
View modelsFlood & Temperature Sensors
Water-leak probes and temperature sensors for kitchens, plant rooms, and compact IT cupboards.
View models